.flex{
    display: flex;
}

.flex-col{
    display: flex;
    flex-direction: column;
}

.flex-1{
    flex: 1;
}

.flex-jc-left{
    justify-content: left;
}

.flex-jc-center{
    justify-content: center;
}

.flex-jc-right{
    justify-content: right;
}

.flex-jc-sb{
    justify-content: space-between;
}

.flex-js-sa{
    justify-content: space-around;
}

.flex-js-se{
    justify-content: space-evenly;
}

.flex-ai-center{
    align-items: center;
}